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发布时间:2023-10-14 09:47:29

[单项选择]Why was the hydraulic fuel pump seal important for the space shuttle
A. Because previous seals all failed.
B. Because it was very complex in running the space program.
C. Because cracks in the seals could be disastrous.
D. Because great care has to be taken of the hydraulic fuel pump sealing.

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